Abstract
The detection of the freshwater genus Rhizosolenia (Bacillariophyceae) remains in sediments is affected by the oxidants used in the digestion procedures. The Rhizosolenia counts decrease from 30% H2O2>50% HNO3>50% chromic acid>100% HNO3>100% H2SO4. Rhizosolenia is mostly found in Ontario lakes with summer average pH ranging from 5.6 to 8.3, Gran alkalinity from 0.2 to 120 mg L−1 as CaCO3 and water colour from 4 to 105 Hazen units. Large Rhizosolenia populations are generally found in clear lakes, neutral pH and low alkalinity.
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Yung, Y.K., Nicholls, K.H. & Cheng, A.G. The detection of Rhizosolenia (Bacillariophyceae) in sediment of Ontario lakes and implications for paleoecology. J Paleolimnol 1, 61–69 (1988). https://doi.org/10.1007/BF00202194
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DOI: https://doi.org/10.1007/BF00202194